参考示例如下：
import { util } from '@kit.ArkTS';
import { BusinessError } from '@kit.BasicServicesKit';
@Entry
@Component
struct FileToString {
build() {
Row() {
Column() {
Button('file to string')
.onClick(() => {
getContext().resourceManager.getRawFileContent('test.txt').then((value: Uint8Array) => {
let textDecoder: util.TextDecoder = util.TextDecoder.create(); // Call the TextDecoder class of the til module
let decodedString: string = textDecoder.decodeToString(value); // 对Uint8Array解码
let strBase64 = new util.Base64Helper().encodeToStringSync(value); // Convert a Uint8Array to a Base64 string
console.info('retStr:', decodedString);
console.info('strBase64:', strBase64);
}).catch((error: BusinessError) => {
console.error(`callback getRawFileContent failed, error code: ${error.code}, message: ${error.message}.`);
});
})
}
.width('100%')
}
.height('100%')
}
} 参考链接